Gin-cylinder.



No. 868,965. PATENTED OCT. 22. 1907.. C. B. P. CARVER.

GIN CYLINDER. AmfLIoATIoN FILED SEPT. 6. nos.

s co.. wAsHmcroN, n. c.

UNITED STATESw PATENT OFFICE.

CALVIN B. P. CABVER, OF BRIDGEWATER, MASSACHUSETTS.

GIN-CYLINDER.

To all 'whom it may concern:

Be it known that I, CALVIN B. P. CARVER, ofl Bridgewater, in the county of Plymouth and State oi Massachusetts, have invented certain new and useful Improvements in Gin-Cylinders, of which the following is a speciiication.

This invention relates to saws for cotton gins, and i consists in the construction of a saw-cylinder in which the saws are mounted.

Figure l in side elevation, shows a saw constructed in accordance with my invention, the metal of the cylinder being broken away for convenience, showing an arrangement of saws with relation to the cylinder and one another. Fig. 2 is an end elevation of the construction shown in Fig. l. Fig. 3 is alongitudinal sectional view of a saw-cylinder shown in Fig. l, showing the arrangement of the hubs of the cylinder with relation to the driving-shaft and the grooves in said cylinder for receiving and holding the saws. Fig. 4 is a cross-sectional view on line 4-4 oi Fig. 3, showing the lugs in a saw-cylinder against which the saws are held. Fig. 5 is a side elevation oi a portion of a gin saw. Fig. 6 is a like view, showing the method of constructing the gin saw in two parts. Fig. 7 is a perspective view oi one of the wooden wedges by which the saws are fastened.

The same reference characters indicate the same parts in all of the figures.

l represents a driving cylinder for a gang of saws used in ginning cotton or linting cotton seeds. Asconstructed prior to my invention, the' several saws for making up the gang or use in said process have been slid upon a shaft and spaced apart by blocks. Such construction is common and requires no particular description. The use of the shaft and the space block requires'a great deal of time for the proper mounting and spacing of the saws and this arrangement is subject to a number of inrmities in practical operation, requiring a gage in which the saws are placed at the time oi their being spaced on the shaft with space blocks. The saws are liable to more 0r less displacement due to unevenness 0i the space blocks and the expansion or contraction by moisture, and the diliculty of replacing any of the saws. By my invention all these difiiculties are overcome. I secure upon the shaft l, a sawcylinder 2, comprising in the iorm shown, two hubs 3, 3, keyed upon the shaft by a spline 4. The hubs 3 are formed with spokes 5 which support a cylindershaped shell 6. The cylinder upon its periphery is formed with a plurality of longitudinal ribs 7, 7, there being ten of such ribs in the form shown,.although this number may be varied, if desired. Each of the ribs 7 is formed with a series of slots 8, 8, a slot in one rib being in the saine vertical plane as the complemental slot in the other ribs, andV being of sufficient Speciication of Letters Patent.

size to receive the lugs hereinafter described, on the Patented oct. 22, 1907.

Application tiled September 5, 1905. Serial No. 276,925.

inner circumference of the saws. The ribs 7, 7, as shown, are separated by a space 9 ior a purpose hereinafter described.

Instead of forming the saw as heretofore, with a uniform inner circumference, I form the inner circumference with a series of lugs ll, separated by spaces l2, each space 12 being of a size to receive a rib 7 of the cylinder 2, and each lug Il being of a size to lit and slide in a space 9, and also to enter a slot 8. One or more of said lugs is formed with a tooth, as 13, adapted to project down below the bottom of a slot 8 and engage the wall 14,below said slot, the tooth 13 serv- .ing as a driving connection between the cylinder and the saw. Any other means may be employed for effecting the driving connection between the saw and cylinder.

In practice, a saw constructed as in Fig. 5, is slid over the cylinder 2 with its lugs ll in the space 9 between the ribs 7 and with its space l2 over the ribs 7, this arrangement permitting the saws to be slid irom one end to the other of the cylinder.

Referring to Fig. l, assuming that no saws are on the cylinder, the saw now at the left of the cylinder will be slid on until its lugs ll come opposite the grooves 8 at the left end. The saw would then be given a sufiicient turn to bring its lugs Il into the space 9. Thereafter, a wooden wedge 20, is driven down between each lug lland at the side of a tooth 30, thereby firmly binding the saw in place, the left-hand end of the tooth 30 serving as a gage for the accurate seating of the saw. Thereafter, the other saws arer assembled in the same way, there being no necessity in spacing the saws apart by the space blocks, the teeth 30 not only serving as a spacing means, but also as means for bindingv the saws to the cylinder.

Instead of forming the saw as in Fig. 5, I may form the saw in two parts, as shown in Fig. 6, one of the parts being formed with an interlocking member, 50, adapted to coact with a complemental interlocking member, 60, on the other part. While this form of saw may be used generally, I have designed it particularly or use in repairing, when one of the saws in the gang becomes broken. I can by my improved form of saw cylinder easily and quickly insert the form of saw shown in Fig. 6, interlocking the same and fastening it in its propel place between the teeth 30.

Having thus explained the nature of my invention and described a way of constructing and using the same, though without attempting to vset forth all oi the forms in which it may be made, or all of the modes of its use, what I claim and desire to secure by Letters Patent is 1. A gin-cylinder comprising a cylinder formed with series of longitudinal ribs separated by spaces, each of said rios being slotted to form teeth, the teeth and slots of one l plclnental teeth and slots of the other ribs, a saw formed upon its interior circumference with a series of lugs sepa` rated by spaces corresponding to the ribs and spaces on the cylinder', the lugs of the saw being arranged in grooves in the ribs, and means for securing,l the parts in place.

A gin saw cylinder comprising a hub formed with a series of longitudinal ribs, each of said ribs being slotted to forni a series of teeth, the teeth and slot of one rib lying,r in the salue radial' plane as the complemental teeth and slot of the other ribs.

A gin cylinder comprising a barrel formed with a series of longitudinal ribs, each of which is slotted to forni a series of teeth, the teeth and slots of one rib being arranged in the same radial plane as the teeth and slots of the other rib, a gin saw formed upon its interior circum;

ference with a series of lugs separated by spaces, said lugs being arranged in position in the slots and ribs of the barrel. and a driving connection between the barrel and the saw.

In testimony whereof I have axed my signature, in presence of two witnesses.

CALVIN Pf CARVER. 

